Valve mechanism



p 2, 1929. F. D. HOLDSWQRTH VALVE MECHANISM Filed Jan. 21 1922 Patented Apr. 2, 1929.

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FRED ID. HOLDSVIORTH, O1? CLARE'MUN'I, NEW HAM? MACHINERY COMPANY, f-z. CUIRFOIEATKON 01! 13.5%..

ll" .ASSETGNQR TO EULLIVAN ItllCl-IUSIETIEL VALVE ralsonn vrslu.

Application filed January ill, 1922. Serial No. 530,925.

My invention relates to valve mechanisms, and more particularly to improved valve mechanisms for use in connection with air compressors, pumps or similar devices.

An object of my invention is to provide an improved valve mechanism. .l inoth'er object oi? my ii'ivention to provide an improved andv simplified urivo mechanism giving; argre port area in a relatively small space. A fun ther object ot' my invention is to provide an il'i'iproved valve mecnanism in which the ma- (shining operations shall be relatively tiw and as many parts as possible shall be made up by stamping or by similar processes. Other objects and advent es of my invention will hereinafter more why appear.

in the accompanying drawings 1 have shown for purposes ofillustratio one form which my invention may assume in practice.

In those drawings,

Fig. 1 is a plan view of a disol'iarge valve constructed according to the illustrative embodiment of my invention.

*ig. 2 is a transverse section on the line 2-2 of Fig. 1.

Fig. 3 is a plan and an edge View of a spring used in the illustrative term of my improved valve mechanism.

Fig. l is an edge view oi the guard partially broken away to facilitate illustration.

In the form of my invention which I have selected to disclose for purposes of illustration, it will be observed that I havoillustrated. a iragn'ient of a compressor cylinder 1 in which a valve cage receiving); chamber 2 is lorn'ied, but it will be understood that the chamber 2 might equally well be formed in the head men'iber of a compressor cylinder if desired. The cage receiving; chamber '2 is provided at its lower edge with a seating surtaco 3 upon which a valve mechanism con structed in accordance with the illustrative form of my invention is seated. This valve mechanism is generally designated 1- and comprises a seat member 5, a guardmember 6, independent valve members 7 and 8, and springs 9 and 10.

The seat member is provided at its upper side with a seating" surface which is made up of a number of beads in elevation 11, these beads or annuli all being ground oil to a common plane. It will be noted that annular grooves 12 extend completely around the top of the member 5 between certain pairs of annuli or beads and serve to constitute an nular ports, and that with these grooves 1? suitable passages 13, traversing the remaining thickness oi? the seat member l, conin'iunicate. Between the grooves 12, of which two are shown herein, is arranged a shullmv groove 15 which cooperates in forming certain ot the beads or annuli 11 previously referred to and also provides a socket in which the guiding elements of t e p uard member (3 may be received. The seat member 5 is cciiinterbored slightly at its central portion as indicated at 16 to provide an innermost head or annulus. The giiiard member is formed from an annular disc oi? relatively thin sheet metal by a stamping or drawing process. .lt will benoted that it is traversed by a series of iiow slots 17 and the metal which previous to the stumping operation filled these liow slots has been slit at the median point of the length 01' these slots and then bent down in i opposite directions to term guiding elemen s or wings 1S. It will also be noted that by a punching, spinning, or drawing process, the

central portion of the"plate of which the guard 6 is made is depressed to form a llat bottom 19 with guiding walls 20; and that in order to provide an additional series of flow passages, portions of the material of the guiding walls 29 and ot the bottom 19 are ground out as indicated at 21. Then the guard member has been finished as described, it is brought into contact with a grinder, and all the downwardly extending surfaces are ground to a single plane.

The valves which are annular in shape and formed of relatively thin sheet metal, are shown at 7 and 8, and are comentrically arranged over the grooves 12 and of such size to be guided. at their adjacent edges by the depending guide members 18 which sent in the grooves 15. The valve member 8 is guided at its inside by the guiding surfaces 20. The springs 9 and 10 are made up of relatively thin sheet metal similar in. contoi'ir to the valve members Y and 8 and are then passed through rolls which bow them transversvily Having had their ends upturned, the surin are disposed upon the valves and, upon placing of the guard in position with the memhers-18 in the groove 15, the valve is ready for permanent assembly which is acetonplished by means of a bolt 2% and nut It will. be evident that as air compressed in the cylinder when the pressure rises to a sufiicientheight, the air within the cylinder fill Will act byWa-yof ports 13 and grooves 12 upon the lower surfaces of the valve rings 7 and Sand willunseatthem, tending to fiatten the springs 9 and 10 and that upon opposite movement oi the piston the valves Will be closed by their springs. During opening and closing movements of the valves, they will be guided by the guiding elements on the combined guard and guide members and thereby caused to seat and open smoothly and even While I have in this application 'specilr cally described one iormivhich my invention may assume in practice, it will be understood that this form olf'the same is shown for purposes of illustration and that the invention may be modified and'embodied in various otl'ieritorms without departing from its spirit or the scope of the appended claims.

hat I claim as new and desire to secure by Letters Patent.- is:

1. In a valve mechanism, a valve seat member providing concentric valve sea-ts, separate concentrically disposed annular valves, separate annular springs cooperating with said valves, and common guiding means for said springs and valves having wings intermedia te said valves and cooperating to directly hold said springs and valves in position.

2. Ina valve mechanism, a valve seat member having concentric valve seating surfaces spaced by'an annular groove, a sheet metal guard and'guide member having pairs of closely adjacent guiding elements seating in said groove, valves on said seats, and springs between said guard and seat member.

3. In avalve mechanism, a valve seatmcmher having concentric valve seat surfaces and sockets at opposite sides of the innermost one of said-surfaces, asheet metal guard member having portions seating in said sockets, separate valves onsaid seati surfaces, and springs,

one individual to each valve, between said valves and said guard-member.

- '4. In a valve mechanism, avalve seat member having-concentric valve seat surfaces and sockets at opposite sides of one of said suri'aces,a guard member having portions seatmg in said socl-:ets,means whereby saidinner socket forms an nitial clamping surface wvhen said guard is in operative position, sepber having concentric valve seat surfaces and sockets at opposite sides of one of said suriaces, a guard member having linger portions seating in one of said sockets and having a central portion providing guiding menus seating in the inner one oi said sockets, means whereby said central portion 1. ms an initial clamping means for said guide, separate annular valves on said seat surfaces, and separate annular springs between said valves and said guard member and guided by the latter.

7. In a valve mechanism, a valve seat incur her having concentric valve seat surfaces, a sheet metal guard disposed parallel to the plane of said surfaces and held in spaced relation thereto by means of guiding: clcizicnts comprising a central hub portion cut auuy to provide tiovv passages and also comprising guiding elements radially spaced from said hub portion, and separate concentric valves cooperating with said scat surfaces and guided by opposite edges of said guiding elements.

8. As an article of manu'lzwturc, a sheet metal valve guard comprising a guard plate perforated to provide iiow 1 a ing integral guiding prising strips bent from sai flow pas and arranged substantially perpendicular to the surface of said guard plate at the ends of said flow passages.

9. In a valve mechanism, a valve seat structure providing a valve seat, a valve associated with said seat, and a sheet metal guard for said valve comprising a body portion having free endcd fingers bent therefrom about radial lines to provide flow slots and plOjQCting angularly from said guard, said lingers being disposed edgewise to the valve and adapted to space the guard at predetermined distance from the valve seat.

10. An article of manufacture comprising a substantially circular one-piece sheet metal valve guard having a generally flat guard surface and linger portions integral therewith, spaced inwardly from the outer periphery oi said guard and disposed substantially perpendicular to said flat surface in planes including radial lines in said guard, said guard having flow slots-therein between said finger portions and there being two linger portions individual to each slot.

ll. An article of manufacture comprising a sheet metal valve guard having a generally fiat guard surface and guiding and positiontreeendedlingers integral thcreu 'ith and bent therefrom about radial lines and 'disposed substantially perpendicular to the flat guard surface, said guard having flow slots therein adjacent the lingers, in which said lingers might be received it. bent down into theplane 0i the-guard surface.

Intestimony whereof Iaiiix my signature.

FRED D. HOLDSWORTH.

CERTIFICATE OF CORRECTION.

iatent Nor 1,707,306. Granted April 2, 1929, to

FRED D. HOLDSWORTH.

iiied that, error'appears in the printed specification of the tion as follows: Page 2, line 126, claim and that the said Letters Patent should the record It is hereby cert above numbered patent requiring eorrec 11, for the word "bent" read rehent; he read with this correction therein that the same may conform to of the case in the Patent Office.

Signed and sealed this 7th day of May, A. D. 1929.

M. J. Moore, (Seal) Acting Commissioner oi Patents. 

